Receptacle for incandescent lamps.



H. C. WIRT.

REGEPTAGLE FOR INCANDESGENT LAMPS.

APPLICATION FILED rBB.27,1906.

91 7,229, Patented Apr. 6, 1909.A

Winesses:

A Y 2.2V /J 20 lifeline-'wifl CAA/WC; 44a/ M H I Mg,

citizen of UNITED STATES PATENT HERBERT C. WIRT, OF SCHENEOTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

RECEPTACLE FOR INCANDESCENT LMPS.

To all 'whom it may concern:

Be it known that I, HERBERT OfVVIRT, a the United States, residing at Schenectady, in the county of Schenectady, State of New York, have invented certain new and useful Improvements in Receptaj cles for Incandescent Lamps, of which the following is a specification.

This invention relates to sockets or receptacles for incandescent electric lamps, and more especially those used for indicating the presence or absence of current in apparatus connected to switchboards and the like devices.

The object of the invention its o provide a .thoroughly protected device of `this character which is adapted for a ready renewal of lamps and also of compact design so that it will not'encroach upon the space occupied by other devices supported bythe switchboard.

In carrying out my invention, I provide a stationary insulating part adapted to be permanently attached to a panel board or o-ther support and having suitable contact means for connecting with line conductors, and a removable insulating with rigid contacts for detachably engaging the contacts on the stationary member and also operating to hold the two members in engagement, and lamp receiving contacts y mounted between the rigid contacts and connected respectively therewith, the connection to the center lamp contact being provided with means for detachably receiving an inclosed fuse whereby the filament of the lamp is protected against abnormal currents.

In the accompanying drawing, which formsa part of this specification, I have shown the preferred form of my invention, Figure 1 being a vertical axial section of the receptacle with an incandescent lamp attached thereto Fig. 2 is an axial section o1 the movable part taken at right angles to that shown in Fig. 1'; Figrlmisy a vertical axial section of the stationary member; Fig. 4 is a plan view of the same; and Fig. 5 is a plan view of the movable member.

The stationary insulating member 1 has end extensions 2 in which are holes 3 for the screws for attaching the receptacle to the panel board or other support. At the center is a cylindrical aperture 1 through which-the lamp 5 is free to pass in connect- Sp'eccation of Letters Patent. Application filed February 27, 1906.

part provided.'

Patented April 6, 1959. Serial No. 303,269.

ling and disconnecting the movable mernl'oer.` The left-hand side of the stationary member is provided with a crown projection 6, and within its inner surface are two ledges 7 l against which the' contacts of the movable part abut when in operative position. j At. diametrically opposite points the crown I projection 6 is cut away for the reception of the stationary contacts 8, 9. These contacts each comprise a metallic angle piece j with a binding screw 1() in one leg and the other leg overlying one end of a phosphorbronze spring 11 which it holds in place j* against the body of the insulating member I by means of a screw 12 extending therej' through and threaded into the said leg or" the angle piece. The springs 11 are bent under so that their free ends form inclines 13 -which operate upon the contacts of the movable member to" securely bind the latter 1 in place when rotated through a slight angle. The movable insulating member 14 is in the form of a circular block, and has on its right-hand side a cylindrical projection 15 j of a size to enter freely within the crown i projection 6 of the stationary member and forming a shoulder 17 on the block which j normally engages the outer edge of said projection. At the center of the cylindrical j projection 15 is a circular cavity 18 for the terminal 19 and on opposite sides thereof are formed recesses 20, 21, for the reception of the rigid` contacts 22. Recess 20 extends into the central cavity 18 and metallic conductor 23 which is clamped between the contact 22 and the bott-om of the recess by a screw 24 extends therethrough and through a hole in the side of the screwshell contact 19, and has at its inner end a ring-shaped head 25 which seats upon the iiange oi the shell and is clamped thereto by an insulating disk 26 and a screw 27 which holds the central contact terminal' 28 in place. The recess 21 is separated from the central cavity 18 by a barrier 29 and has a bent channel 30 leading from one side thereoi1 in which is located a metallic conductor 31 which is bound in place against the bottom of the recess by a screw 32 extending through the insulating member and engaging' a threaded hole in the contact 22.

The left-hand side of the movable insulating-member has a transverse channel 33 j formed therein for the reception of a fuse 254 reception of a iiangcd screw-shell contact ies.

and its contact clips 35. The sides of the ranged in one of th rigid ,contacts 22 thereon from the contact 'springs 1l on the Vterminals and contacts for engaging the terminals and two contacts for engaging the channel have central recesses 36 to permit stationary contacts, a fuse mounted on the the thumb and finger to be inserted for the g opposite face of said block, connections weX- purpose of removing the fuse. One of the i tending therefrom to a lamp termlnal and a clip contacts 35 connected to the bent conl' contact, and a connection from the other ductor 31 by a screw 37, and the other clip I contact to the second lamp terminal. contact is held in place by a screw 38 and 3. In a lamp receptacle, the combination connected to the second. screw 27 by a me- 'with stationary contacts, of an insulating tallic conductor 39. block having on one face a central recess in When it is desired to renew a lamp 5, the which are secured lamp holding terminals movable member 14 is rotated through an and two side recesses in which are secured angle of about backwardly to disengage l contacts adapted to engage the stationary contacts and in the opposite face of which is formed a channel in whichare secured two fuse clips one of which is connected to a lamp terminal and the other to a contact thereon, and a metallic conductor connecting y the other contact with the second lamp terminal. 4. In a wall socket, the combination of terminals for making an electric connection with the device inserted in said socket, spring clips in series therewith, and an inclosed fuse stationary member, and thereafter drawing the movable member axially away from the stationary member, the lamp passing freely through central aperture 4, a new lamp may be substituted i for they one removed in the usual manner and the parts replaced in their operative posii tions by a reversal of the operations of re- I movmg. l

I do notkdesire to restrict myself to the pari yticular form or arrangmentcf parts herein described and shown, since it is apparent that they may be changed and modified without departing from my invention.v

from said spring clips by a movement at right angles to the axis of said fuse.

5. In a Wall socket, the combination of a base having a portion to be secured to the `What I claim as new anddesire to secure 1 wall and another portion at an angle thereto, by Letters Patent of the United States, is: 5 a recess formed in said last named portion, a 1. In a lamp receptacle, the combination pair of spring clips being located in said with stationary contacts, of an insulating recess, and an inclosed fuse engaged by said block having on one face lamp engaging. spring clips, one clip being adapted to be secured to a line terminal and the other clip stationary contacts and respectively coni being secured to a socket terminal. nectedy to said lamp terminals, and a fuse ar- In witness whereof, I have hereunto set e connections between I my hand this 26th day of February, 1906. i HERBERT C. `WIRT.

terminals and contacts 011 said block.

2. In a lamp receptacle, the combination l with stationary contacts, of an insulating block having on one face lamp engaging Witnesses:

BENJAMIN B. HULL, HELEN ORFoRn.

adapted to be inserted into and' removed. 

